Temperature and Face Dependent Copper-Graphene Interactions
| Autor: | Johan Ek Weis, Martin Kalbac, Sara D. Costa, Otakar Frank |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Copper substrate
Condensed Matter - Materials Science Materials science Condensed Matter - Mesoscale and Nanoscale Physics Graphene Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences chemistry.chemical_element Nanotechnology General Chemistry Weak interaction Copper law.invention Condensed Matter - Other Condensed Matter symbols.namesake chemistry Chemical physics law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) symbols General Materials Science Raman spectroscopy Graphene nanoribbons Other Condensed Matter (cond-mat.other) Graphene oxide paper |
| Popis: | The interaction between graphene and metals represents an important issue for the large-area preparation of graphene, graphene transfer and the contact quality in graphene devices. We demonstrate a simple method for estimating and manipulating the level of interaction between graphene and copper single crystals through heat treatment, at temperatures from 298 K to 1073 K. We performed in-situ Raman spectroscopy showing Cu face-specific behavior of the overlying graphene during the heat treatment. On Cu(1 1 1) the interaction is consistent with theoretical predictions and remains stable, whereas on Cu(1 0 0) and Cu(1 1 0), the initially very weak interaction and charge transfer can be tuned by heating. Our results also suggest that graphene grown on Cu(1 0 0) and Cu(1 1 0) is detached from the copper substrate, thereby possibly enabling an easier graphene transfer process as compared to Cu(1 1 1). |
| Databáze: | OpenAIRE |
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